Glass-drawing-pot trunnion.



I W. L. MONROu GLASS DRAWING POT TRUNNION.

APPLICATION FILED MAR. 20, 1911.

Patsntefi. June 15, 1915,

WITNESSES minima E STA WILLIAM [1. MONRO OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TQWINDOW GLASS MAcHruncoMrANY, or rrrrssgunerr, PENNSYLVANIA, A ooaronn-rrou or NEW JERSEY," I i Y Application filed llfarch 20, 1911. Serial No. 615,582.

To all whom: it may concern: i

- Be it known that I, WI LIAM 'L. Monro, a resident of Pittsburgh, in the county of Allegheny and State of-Pennsylvania, have V inventeda new and useful Improvement in Glass-Drawing-Pot Trunnions, of which the following is a full, clear,.and exr ct description, reference being had to the accompanying drawings, forming part of this specification, in 'which j Figure-1 is a plan view partially roken away of aglass'drawingpot embodying my invention; and Fig. 2 is a perspective view "showing one of the trunnion members.

My invention has relation to. glass drawing pots, and more particularly to reversiblezpots havingtrunnions upon which the pots are supportedand turned.

Prior to my invention great difiiculty has been. experienced by reason of the trunnions of these pots burning away, after 'a comparatively short period of use by reason of the very considerable heat to which they are,

.' exposed.

My invention is designed to. provide a .trunnion member which will largely overcome this difficulty and greatly extend the life of the pots and trunnions.

The nature of my invention will be best ing drawing, in which I have shown the preferred embodiment thereof and which will now be described. it being premised,'.

however, that Various changes may e" made .in the details of construction, and a range ment of the parts, without departin from the spirit and scope of my invention as defined in the appended claims. j

' In, he drawings, the numeral 2 designates 40 the top-stoneof a kiln, and 3' a reversible pot. This pot is formed with diametrically opposite sides, with the integral trunnion are preferably cast into the hubs of these caps. V Heretoiore, caps of time character have been provided with extended flanges, so as to GLASS-DRAWING-POT TRUNN ION.

Specification of Letters Patent. I

understood by reference to the accompanyounce.

Patented June 15, 1915.

inwardly to a point where it is subjected to severe heat. This extended engagement between the caps and trunnion portions of the pot has been necessary in order to afford a secure connection between the caps and the pot. In accordance with my invention, the flanges of the caps are made relatively shallow, so as to engage only the outer end portions of one of the pot trunnions, and a secure connection is insured by providing the caps with an inward projection 9, extending into cavities in the pot trunnions. This projection may be of various forms. In the drawings, I have shown it as of hexagonal form, the cavity and the pot trunnion being of corresponding form.-

By the provision of the projections 9, to,

afford a secure connection between the pot and the trunnion shafts, I am enabled to reduce the depth of the cap flanges. in the manner before described, and actual prac-v tice has shown that my invention prolongs to'a very great extent the actual life of the parts.

I claim:

1. A glass drawing pot having a non-metallic refractory trunnion, and a trunnion shaft having both interior and exterior actuating connection with the trunnion; substantially as described.

2. A glass drawing pot having a non-metallic refractory trunnion, and a trunnion shaft having both interior and exterior actuating connection with the trunnion, the interior actuating connection being formed by an inward, angular projection of the trunnion shaft, and the exterior connection being formed by engaging angular portions of the shaft and trunnion; substantially as described.

3. A glass drawing pot of non-metallic refractory material, an integral trunnion formed with an axial opening extending into itsyouter end, said opening being non-circula:- in cross section, and a trunnion shaft *having a flange embracing the outer end portion of the trunnion, and also having an.

angular projection fitting said opening and forming a driving connection between the shaft and the trunnion; substantially as described.

4. The combination with a glass drawing pot having a trunnion of non-metallic refractory material, of a trunnion shaft .having a relatively shallow flange fitting over 5 .the outer end of the trunnion and having angular driving engagement therewith, and said shaft having an axial extension within the trunnion and having an angular driving engagement therewith, said extension being '10 of greater length than the said flange; substantially as described.

5. A trunnion shaft for glass drawing 1,14s,aee

pots, comprising a shaft member formed with an enlarged flange having a polygonal internal peripheral wall, and an .axial exten- 15 sion of angular cross section and'jof greater length than the flange; substantially as described.

In testimony whereof, I have hereunto set.

my hand.

WILLIAM 'L. MONRO. Witnesses:

ALICE A. Tmnn,

Rona. J. WHALEN. 

